For a class assignment, but also because I was too lazy to draw something!
http://www.deviantart.com/view/23154054/ http://www.deviantart.com/view/23154116/ http://www.deviantart.com/view/23154272/ http://www.deviantart.com/view/23154317/
It's interesting to note the difference in deviation number; I submitted these as successively as I could.